A more substantial first-look at Marvel's Agents of SHIELD TV series is set to air tonight, but eager viewers can get an early teaser on Vine. Not surprisingly, the 6-second clip is full of quick cuts and plenty of action, but it ultimately brings its focus to a major twist of the series introduction: that Agent Phil Coulson, a character believed to have died in The Avengers, is still alive. ABC picked up a season of the show based on a pilot written and directed by Joss Whedon, who was in charge of The Avengers as well. Though details on when the show will begin haven't been announced yet, a full teaser for the pilot episode will be airing tonight after the season finale of Once Upon A Time.